Area Code 781-390 located in RANDOLPH, NORFOLK, MA, more detail is as below. Place NPA (Numbering Plan Area) : 781 NXX (Local Number Prefix) : 390 City : RANDOLPH County : NORFOLK State : MA (Massachusetts) NXX Use Type : Landline NXX Intro Version : 2001-06-30 FIPS (Federal Information Processing Standards) : 25021 LATA (Local Access Transport Area) : 128 Rate Center : RANDOLPH ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 02368 Other Information NPANXX : 781390 Switch CLLI (Common Language Location Identifier) : CMBSMAAZDS0 MSA CBSA (Core Based Statistical Area) : Boston-Cambridge-Quincy, MA-NH MSA CBSA Code (Core Based Statistical Area) : 14460 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : BROADWING COMMUNICATIONS, LLC - MA OCN (Operating Company Number) : 8924 Coverage Area Name : RANDOLPH Latitude : 42.1649 Longitude : -71.0414 ‹ previous : 781-389 next › : 781-391 Telephone Number List 781-390-0000 ~ 781-390-9999